fix: re-export FocusableElement, HoverEvent and KeyboardEvent types from react-aria-components

[sobol-sudo]

Closes #10166.

react-aria-components re-exports a curated subset of @react-types/shared, but three types that show up structurally in the public ButtonProps aren't in that list: FocusableElement, HoverEvent and KeyboardEvent. Since @react-types/shared is only a transitive dependency for consumers, TypeScript can't write a portable import for those names when it emits declarations, so a project using composite + declaration that wraps Button or exports a type inferred from ButtonProps fails with TS2883.

The chain is ButtonProps → AriaButtonProps → PressEvents/FocusableProps: onClick is typed MouseEvent<FocusableElement>, onKeyDown/onKeyUp take the shared KeyboardEvent alias, and HoverEvents brings in HoverEvent. The Omit<> on ButtonProps doesn't strip any of them.

This adds the three names to the existing @react-types/shared re-export block, and to exports/Button.ts, which is a published subpath that already re-exports PressEvent from the same module and hits the same error. It deliberately doesn't blanket re-export everything from @react-types/shared, per @LFDanLu's note on the issue. Same shape as #9955.

I also added four assertions to the existing test/types.tsx so these stay nameable from the package root. Three of them fail on main with TS2694; the fourth is PressEvent, which already works and is there as a control so the whole event-type group is covered rather than just the new names.

react-aria has the same gap — it exports HoverEvent and KeyboardEvents but not KeyboardEvent or FocusableElement. Happy to do that as a follow-up if you want it.